Update app.py

app.py

@@ -33,7 +33,7 @@ def get_all_videos(URL, channel_id):
   pageToken = None
   while True:
     response = get_videos(URL, channel_id, pageToken)
-    for item in response["items"]:
+    for item in response["items"][:20]:
       videos.append(item["id"]["videoId"])
     pageToken = response.get("nextPageToken")
     if not pageToken: